The reaction of Na2 CO3 salt is____________________?

Related Mcqs:

1. Total salt affected soils of Pakistan are____________________?

   A. 6.3 m ha
   B. 5.0 m ha
   C. 12.3 m ha
   D. 10.5 m ha

2. Salt-tolerant plants are called ____________________?

   A. Glycophytes
   B. Halophytes
   C. Xerophytes
   D. All the above

3. According to WAPDA, the ECe of the salt free soil should remain__________________?

   A. < 4 dsm-1
   B. Equal to 4 dsm-1
   C. 4-8 dsm-1
   D. None of the above

4. Which is/are dominating salt/s in alkali soil:

   A. NaHCO₃
   B. Na₂CO₃
   C. MgSO₄
   Both a & b

5. Most salt tolerant grass is___________?

   A. Para grass
   B. Giant star grass
   C. Kallar grass
   D. All of the above

   Submitted by: Shafiq Rehman

6. Which one of the following is a high salt tolerant crop?

   A. Moong
   B. Arhar
   C.  Both a & b
   D. Lucerne

   Submitted by: Shafiq Rehman

7. pH of Pakistani soils is____________________?

   A. 7.5
   B. 12
   C. 7
   D. 14

8. The factor used for conversion of P to P2O3 is____________________?

   A. o.453
   B. 0.643
   C. 0.436
   D. None of the above

9. The unit of electrical conductivity is____________________?

   A. dsm-1
   B. mmhos/m
   C. ms/cm
   D. Al the above

10. The most abundant metal in the earth’s crust and toxic to plants in low concentration is____________________?

    A. Mo
    B. Al
    C. Fe
    D. All the above